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Related Questions

• A coil of $N$ turns and mean cross-sectional area $A$ is rotating with uniform angular velocity $\omega$ about an axis at right angle to uniform magnetic field $B$. The induced e.m.f. $E$ in the coil will be

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• A coil of $40 \Omega$ resistance has 100 turns and radius 6 mm is connected to ammeter of resistance of 160 ohms. Coil is placed perpendicular to the magnetic field. When coil is taken out of the field, $32 \mu C$ charge flows through it. The intensity of magnetic field will be

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• In a primary coil 5A current is flowing on 220 volts. In the secondary coil 2200V voltage produces. Then ratio of number of turns in secondary coil and primary coil will be

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• Quantity that remains unchanged in a transformer is

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• The magnetic flux linked with a coil at any instant ‘t’ is given by $\phi = 5t^3 – 100t + 300$, the e.m.f. induced in the coil at t = 2 second is

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